function [A1] = A_1(NmF2)
%
% F2-Layer Amplitude
%
%DESCRIPTION:
%This function computes the F2-Layer Amplitude.
%
%PROTOTYPE:
% [A1] = A_1(NmF2)
%
%--------------------------------------------------------------------------
% INPUTS:
%   NmF2       [1x1]       F2-Layer Max. Density     [1e11 m-3]
%--------------------------------------------------------------------------
% OUTPUTS:
%   A1         [1x1]       F2-Layer Amplitude        [1e11 m-3]
%--------------------------------------------------------------------------
%
%NOTES:
% (none)
%
%CALLED FUNCTIONS:
% (none)
%
%UPDATES:
% (none)
%
%REFERENCES:
% [1] "Ionospheric Correction Algorithm for Galileo Single-Frequency Users"
%      - European GNSS (Galileo) Open Service
% [2] "Electron Density Models and Data for Transionospheric Radio
%      Propagation" - Report ITU-R P.2297-1 (05/2019)
%
%AUTHOR(s):
%Luigi De Maria, Matteo D'Addazio, 2022
%

%% Main Code

A1 = 4 * NmF2;

end